Besides Batman, he's been a Real Genius, Iceman in Top Gun, and virtually became Jim Morrison.
Reports of his death have been greatly exaggerated.
Now, Val Kilmer has written, directed, and stars in Citizen Twain, a one-man show about the eponymous literary giant whose name continues to haunt students on both sides of the Mississippi.
This is not a belated April Fool's joke.
Channeling the legendary author's trademark macabre wit (and looks, thanks to some prosthetic pieces, a prop cigar, and bourbon), Kilmer deploys his show at the Historic Masonic Lodge at Hollywood Forever Cemetery.
But be sure to see it soon, because this limited-run (probably soon-to-be-legendary engagement) won't be around forever.
Unlike Mark Twain.